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Finding the Fourth Proportional to 924.81, 1,385.10 and 718.71

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Solution

The fourth proportional to 924.81, 1,385.10 and 718.71 is: 1,076.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.81 : 1,385.10 = 718.71 : x
  2. Step 2: Convert to fraction form
    924.81/1,385.10 = 718.71/x
  3. Step 3: Cross multiply
    924.81x = 1,385.10 × 718.71
  4. Step 4: Simplify right side
    924.81x = 995,485.22
  5. Step 5: Solve for x
    x = 995,485.22/924.81
  6. Step 6: Final answer
    x = 1,076.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.